Free Well Water Testing For residents of Jefferson County State Code requires old wells to be reconstructed or plugged and cisterns to be filled. Reduce your liability and get them handled now. Grant money is available. For information call Jefferson County Environmental Health 641-472-2561 Free Well Water Testing For residents of Jefferson County State Code requires old wells to be reconstructed or plugged and cisterns to be filled. Reduce your liability and get them handled now. Grant money is available. For information call Jefferson County Environmental Health 641-472-2561